cpu/arm926ejs/at91/at91sam9260_serial.c

   1 /*
   2  * (C) Copyright 2007-2008
   3  * Stelian Pop <stelian.pop@leadtechdesign.com>
   4  * Lead Tech Design <www.leadtechdesign.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26 #include <asm/arch/at91_common.h>
  27 #include <asm/arch/at91_pmc.h>
  28 #include <asm/arch/gpio.h>
  29 #include <asm/arch/io.h>
  30
  31 void at91_serial0_hw_init(void)
  32 {
  33         at91_set_A_periph(AT91_PIN_PB4, 1);             /* TXD0 */
  34         at91_set_A_periph(AT91_PIN_PB5, 0);             /* RXD0 */
  35         at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US0);
  36 }
  37
  38 void at91_serial1_hw_init(void)
  39 {
  40         at91_set_A_periph(AT91_PIN_PB6, 1);             /* TXD1 */
  41         at91_set_A_periph(AT91_PIN_PB7, 0);             /* RXD1 */
  42         at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US1);
  43 }
  44
  45 void at91_serial2_hw_init(void)
  46 {
  47         at91_set_A_periph(AT91_PIN_PB8, 1);             /* TXD2 */
  48         at91_set_A_periph(AT91_PIN_PB9, 0);             /* RXD2 */
  49         at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US2);
  50 }
  51
  52 void at91_serial3_hw_init(void)
  53 {
  54         at91_set_A_periph(AT91_PIN_PB14, 0);            /* DRXD */
  55         at91_set_A_periph(AT91_PIN_PB15, 1);            /* DTXD */
  56         at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS);
  57 }
  58
  59 void at91_serial_hw_init(void)
  60 {
  61 #ifdef CONFIG_USART0
  62         at91_serial0_hw_init();
  63 #endif
  64
  65 #ifdef CONFIG_USART1
  66         at91_serial1_hw_init();
  67 #endif
  68
  69 #ifdef CONFIG_USART2
  70         at91_serial2_hw_init();
  71 #endif
  72
  73 #ifdef CONFIG_USART3    /* DBGU */
  74         at91_serial3_hw_init();
  75 #endif
  76 }